Ad

CVE-2026-34573

HIGH CVSS 4.0: 8.2 EPSS 0.05%
Updated Mar 31, 2026
Parse-Community
Parameter Value
CVSS 8.2 (HIGH)
Affected Versions 9.0.0 — 9.7.0
Fixed In 8.6.68
Type CWE-407
Vendor Parse-Community
Public PoC No

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.68 and 9.7.0-alpha.12, the GraphQL query complexity validator can be exploited to cause a denial-of-service by sending a crafted query with binary fan-out fragment spreads. A single unauthenticated request can block the Node.js event loop for seconds, denying service to all concurrent users.

This only affects deployments that have enabled the requestComplexity.graphQLDepth or requestComplexity.graphQLFields configuration options. This issue has been patched in versions 8.6.68 and 9.7.0-alpha.12.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Weakness Type (CWE)

Vulnerable Products 13

Configuration From (including) Up to (excluding)
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*
8.6.68
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*
9.0.0 9.7.0
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha1:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha10:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha11:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha2:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha3:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha4:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha5:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha6:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha7:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha8:*:*:*:node.js:*:*
Parseplatform Parse-Server
cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha9:*:*:*:node.js:*:*